package com.itheima.web;

import com.aliyun.oss.ClientException;
import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.OSSException;
import com.aliyun.oss.model.OSSObject;
import com.itheima.common.R;
import com.itheima.utils.OSSProperties;
import lombok.extern.slf4j.Slf4j;
import org.apache.tomcat.util.http.fileupload.IOUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.util.UUID;
@Slf4j
@RestController
@RequestMapping("/common")
public class CommonController2 {
    @Autowired
    private HttpServletResponse response;
    @Autowired
    private OSSProperties ossProperties;

    /**
     * 文件上传
     * @param file
     * @return
     */
    @PostMapping("/upload")
    public R upload(MultipartFile file) throws IOException {
        log.info(file.toString());
        String originalFilename = file.getOriginalFilename();//带文件后缀名
        String suffix = originalFilename.substring(originalFilename.lastIndexOf("."));//截取后缀名
        //使用UUID重新生成文件名，防止文件名称重复造成文件覆盖
        String filename = UUID.randomUUID().toString() + suffix;

        // Endpoint以华东1（杭州）为例，其它Region请按实际情况填写。
        String endpoint = ossProperties.getEndpoint();
        // 阿里云账号AccessKey拥有所有API的访问权限，风险很高。强烈建议您创建并使用RAM用户进行API访问或日常运维，请登录RAM控制台创建RAM用户。
        String accessKeyId = ossProperties.getAccessKeyId();
        String accessKeySecret = ossProperties.getAccessKeySecret();
        // 填写Bucket名称，例如examplebucket。
        String bucketName = ossProperties.getBucketName();
        // 填写Object完整路径，例如exampledir/exampleobject.txt。Object完整路径中不能包含Bucket名称。
        String objectName = filename;//要保存的文件名

        // 创建OSSClient实例。
        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);

        try {
            //核心代码
            ossClient.putObject(bucketName, objectName, file.getInputStream());

        } catch (OSSException oe) {
            System.out.println("Caught an OSSException, which means your request made it to OSS, "
                    + "but was rejected with an error response for some reason.");
            System.out.println("Error Message:" + oe.getErrorMessage());
            System.out.println("Error Code:" + oe.getErrorCode());
            System.out.println("Request ID:" + oe.getRequestId());
            System.out.println("Host ID:" + oe.getHostId());
        } catch (ClientException ce) {
            System.out.println("Caught an ClientException, which means the client encountered "
                    + "a serious internal problem while trying to communicate with OSS, "
                    + "such as not being able to access the network.");
            System.out.println("Error Message:" + ce.getMessage());
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }

        return R.success(filename);
    }

    /**
     * 文件下载
     * @param name
     */
    @GetMapping("/download")
    public void download(String name){

        // Endpoint以华东1（杭州）为例，其它Region请按实际情况填写。
        String endpoint = ossProperties.getEndpoint();
        // 阿里云账号AccessKey拥有所有API的访问权限，风险很高。强烈建议您创建并使用RAM用户进行API访问或日常运维，请登录RAM控制台创建RAM用户。
        String accessKeyId = ossProperties.getAccessKeyId();
        String accessKeySecret = ossProperties.getAccessKeySecret();
        // 填写Bucket名称，例如examplebucket。
        String bucketName = ossProperties.getBucketName();
        // 填写Object完整路径，例如exampledir/exampleobject.txt。Object完整路径中不能包含Bucket名称。
        String objectName = name;

        // 创建OSSClient实例。
        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);

        try {
            // 调用ossClient.getObject返回一个OSSObject实例，该实例包含文件内容及文件元信息。
            OSSObject ossObject = ossClient.getObject(bucketName, objectName);
            // 调用ossObject.getObjectContent获取文件输入流，可读取此输入流获取其内容。
            InputStream content = ossObject.getObjectContent();

            ServletOutputStream os = response.getOutputStream();
            response.setContentType("image/jpeg");

            IOUtils.copy(content,os);

        } catch (OSSException oe) {
            System.out.println("Caught an OSSException, which means your request made it to OSS, "
                    + "but was rejected with an error response for some reason.");
            System.out.println("Error Message:" + oe.getErrorMessage());
            System.out.println("Error Code:" + oe.getErrorCode());
            System.out.println("Request ID:" + oe.getRequestId());
            System.out.println("Host ID:" + oe.getHostId());
        } catch (ClientException ce) {
            System.out.println("Caught an ClientException, which means the client encountered "
                    + "a serious internal problem while trying to communicate with OSS, "
                    + "such as not being able to access the network.");
            System.out.println("Error Message:" + ce.getMessage());
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }

    }
}
